Hi all. I'm looking for some stuff which was posted at various times on RSC, some of the stuff posted for calculating car physics. Now RSC has gone it's all lost, I kept copies but have lost them. Here's what I'm looking for: - The formulas to calculate spring rates from weight/frequency - the formulas were posted by Mr Whippy as I remember. - The formulas to calculate damper rates, they were posted by Cosmo I think. - The car inertia.exe program, the one that we used to use to calculate the car body inertia. - The wheel inertia XML file that Miura posted. Also anything else that I've forgotten :tongue: Anyone got any of the above who could upload it? Cheers, Bruce.